Saturday was particularly difficult, Sierra's parents said, and they relied on faith to keep going.

"I'm optimistic because I have a strong faith in God, and every day I wake up I know he's with me," Marlene Lamar said.

A prayer was said for 15-year-old Sierra, her family, and the searchers by a local pastor. Afterwards, dozens of searchers split off in different directions to look for the missing teen in Santa Cruz, San Benito and Santa Clara counties.

Sierra was last seen March 16, 2012 while she was getting ready for school in the morning at home.

Search and rescue teams found Sierra’s cellphone and clothes in a nearby field. Two months later, investigators had a breakthrough in the case when a 21-year-old Morgan Hill man, Antolin Garcia Torres was arrested and charged with Sierra’s kidnapping and murder.

In the time since, Torres has had seven scheduled court appearances, but has yet to enter a plea.

Investigators said they believe that Torres knows where Sierra’s body is hidden, but is uncooperative when they ask about it.

At Saturday’s ceremony, Marc Klass of the Klass Kids Foundation called for the Santa Clara County District Attorney’s Office to seek the death penalty in the case of Torres in hopes that he’ll reveal Sierra’s whereabouts in exchange for a lesser punishment.

"If he doesn't want to live the rest of his life in a little three-by-five jail, looking at his own mortality with a date of execution coming up, then he better sit down to the table and start dealing," said Klass.

A community awareness and fundraising event also took place in Freemont. Organizers said the money raised will go to pay for food and supplies for the ongoing searches.

PHOTOS: Sierra Lamar vanishes in Morgan Hill

PHOTOS: Sierra Lamar vanishes in Morgan Hill

Sierra, 15, was kidnapped while walking to her school bus stop in Morgan Hill on March 16, 2012.

On March 16, 2012, Sierra LaMar never caught her morning bus ride to school. Her cellphone and handbag with clothes folded inside were found on March 17 and 18 on the side of a road two miles from her house.

Antolin Garcia-Torres is seen the night he was arrested in Morgan Hill on May 22, 2012, on suspicion of kidnapping and murdering Sierra.

Detectives said the tracked him 24/7 for two months before making the arrest because they hoped he would unknowingly led them to Sierra LaMar's body.

Antolin Garcia-Torres is 23-years-old and lives in Morgan Hill. In an unrelated case, his father was convicted of raping Antolin Garcia-Torres's sister for years.

Garcia-Torres' red and black Volkswagen Jetta, seen here, was seized on April 7 and Sierra's DNA was found inside.

Witnesses said they saw the car driving around Sierra's neighborhood the morning she vanished.

As of February 2014, Sierra Lamar's body had still not been found.

Sierra Lamar was a social 15-year-old girl. The high school cheerleader used her smartphone to keep a public online diary. She even snapped a photo of herself with her cellphone on the morning she vanished.

Santa Clara County Sheriff Laurie Smith said her investigators believe Sierra is dead.

Sierra LaMar

Ann Sobrato High School officials alerted Sierra's mother that her daughter never showed up for class on March 16 after the school day was already over. The school has since changed its policy on notifying parents when students are absent.

Sierra’s mother, Marlene, and father, Steve, said their notes were written directly to their daughter, telling Sierra they can’t wait to find her and be reunited again.

"(I wrote) that when I see her, I'm going to hold her in my arms and never let go," said Marlene Lamar.

"I just wrote, 'I love you sierra, I'll see you soon,'" said Steve Lamar.

Sierra's mother, Marlene, said she is holding out hope that her daughter is still alive.

She asked Garcia-Torres to reveal any information he has that could lead to her daughter.

"I would like you to come forward and say where she is, and end this nightmare for us as a family," she said. "I'm not giving up hope, her body has not been found."

Steve LaMar is Sierra's father. He is a convicted child sex offender and separated from Sierra's mother several years ago. Detectives ruled him out as a suspect early-on in the investigation.

The Santa Clara County Sheriff's dive team will resume taking sonar images and diving into reservoirs and waterways in Morgan Hill on Wednesday, May 23.

Garcia-Torres told his mother that he went fishing at the Uvas Reservoir in Morgan Hill the day Sierra vanished.

Because of that, sheriff's search team have been diving in the reservoir for weeks, likely looking for Sierra's body.

Garcia-Torres lives on Monterey Street (point B), in an apartment that is seven miles from Sierra's house (point A).

Antolin Garcia-Torres did not enter a plea at his first court appearance on May 24, 2012. Prosecutors are weighing whether to seek the death penalty.

During the search for Sierra, crews spent most of April and May combing through fields and diving into reservoirs in and around Morgan Hill.

Balloons and flowers are seen on May 22 at Sierra Lamar's mother's house in Morgan Hill.

Sierra's kidnapping made national headlines, and thousands of volunteers who never met the Morgan Hill girl joined search teams to help find her. (April 2012)

Garcia-Torres is also accused of attacking other women outside a Morgan Hill Safeway store where he worked. On March 21, 2009, a man followed and shot a woman with a stun gun as she was walking to her car in Safeway's parking lot. The woman was able to fight the man off, and investigators believe her assaulter was Garcia-Torres.

Sheriff's deputies said they knew early on that Sierra was not just a rebellious, unhappy teenager who ran away from home.

Sierra's mother said she will continue to pray and hold out hope until Sierra is found.

On Day 20 in the search for Sierra Lamar, deputies used this specialized search dog, a five-year-old Boxer named Dakar, in Gilroy and San Martin.

Antolin Garcia-Torres is seen in a mug shot.

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